We've tried nothing and we're all out of ideas!
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I know that it would be out of character, but now I'm trying to make up a plan how this might work. If Mystery can counterspell, then if you send him along while disguised as someone else, it might be possible.
However, as you've said, it would not really accomplish much anyway and Konsi would never do it.
While Mystery doesn't have counterspell, Faelys does, and we own a hat of disguise.